#pragma once
#include<stdio.h>
#include<stdlib.h>
#include<assert.h>
typedef int leixing;
typedef struct poot
{
	int shu;
	struct poot* shang;
	struct poot* xia;
}SL;
void SLinit(SL** lu);
void SLwiecha(SL* lu, leixing x);
void SLprintf(SL* lu);
